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Mathematics, 16.10.2020 18:01 lizzy2951

HELP! Two men running a marathon took a sip of water at the same time 72 minutes after they started the race. If the first man took a sip of water every 9 minutes,
how often did the other man take a sip of water?
I

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HELP! Two men running a marathon took a sip of water at the same time 72 minutes after they started...
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